Telephone dictating system or apparatus.



No. 880,537. PATENTED MAR. 3, 1908.

J. W. KELLY, JR.

TELEPHONE DIGTATING SYSTEM OR APPARATUS.

APPLICATION FILED APE.27.1907.

2 SHEETS-SHEET 1.

No. 880,537. PATENTED MAR. 3, 1908. J. W. KELLY, JR.

TELEPHONE DIGTATING SYSTEM OR APPARATUS. APPLICATION FILED APR.27. 1907.

2 SHEETSSHEET 2.

I 2 Q :A WIRING Q A WIRING mg A WIRING nnrrnn srrns rarnnr tarts. v

- JOHN W. KELLY, JR OF CAMDEN, NEW JERSEY, ASSIGNOR TOlGENERAL ACOUSTIC COMPANY, A CORPORATION OF NEW YORK.

- T all iuhcm it may concern."

useful Improvements in Tele hone Dictating paratus y which a person, for example tie A requirin them to leave their places at their requirements and characteristics which are be able to put any managers station in com- .conversation will not be echoed. or thrown TELEPHONE mc'ra'rrne SYSTEM on AfrARA'rUS.

Specification of Letters Patent.

l atented March 3, 1908.

Application filed April 2'7. 1907. Serial No. 370.649.

Be it known that I, JOHN W. K LLY, Jr., a citizen of the United States, residing at Camden, in the county of Camden and State of NewJersey, have invented certain new and Systems or A paratus, of W ich the following is a full, c ear, and exact description:

My invention relates to what isknown as a (lictogra 11, being a telephonic system or a manager of an. office, may dictate letters to anyone of his corps of stenographers without own des s. -An apparatus of this character forms the subject of Letters Patent No. 843,186 dated February 5, 1907 in which a single managers station is shown havin connection with. a plurality of stenographers stations. r

I11 the resent application 'I have provided an instalfation where there are two or. more managers stationsand any number of stenographers stations. Under these circumstances it becomes desirable-to obtain certain special to such a system. One of these is'to munication with any particular stenogra her s station of theentire system. Anotlier requisite is to have means for putting any managers station'in connection with any other managers station of the system. In carrying out the present invention I s'e-' cure both of these requisites in a very simple, convenient and practical way.

With these objects in view the invention consists in the features of construction and combination hereinafter set forth and claimed. I

In the drawings: Figure 1 isa diagrammatic-view showing the circuits of a diagra 11 system having two'managers stations an embodying the principles of my invention. Fig. 2 is a view illustrating the principlles involved in the talking circuits estab 'hs ed between three mana ers stations. Fig: 3 shows. the same princip e extended to four managers stations.

As has been fully set forth in the atent above'mentioned, one of the essentia principles of a. dictograph apparatus is the provision of separate talking circuits between any two communicating stations so that the back into the room from which it proceeds.

In the said, patent I have illustrated a plan making use of two entirely separate circuits including four wires in each line connection; In my com anion application Serial. No. 368,303,- filed May 18, 1907, I have set forth an arrangement in which substantially separate talking circuits are established between stations over three line wires. In the present case I have used the genera principles ofthe three wire line connections of my said companion ap lication, but have extended them to cover t 1e new and special conditions of the present'case, where there are a plurality of managers stations instead of a single station. The communication between two managers stations is more com-.

plex than that between a managers station and a steno ra hers station because each managers station is equipped with its separate battery for its owntalking circuits, and when two managers stations are in con'i munication with one another it is clear that the battery of one must be cut out or silenced. If the batteries of two communicating managers stations were both in the talking circuitat the same time, they would either neutralize one another to reduce the current flow, or assist one another to increase the current flow, both of which conditions 'are almost equally objectionable since the instruments,

are adjusted to work with a certain current and do not operate as well with other'current values. Also in adapting the system so that any managers station can communicate with any stenographers station, it is apparent thatsome sort of switch or selecting means must be employed. by which the stenographers station can call any desired manager sstation. I

Referring to the drawings, and particularly Fig. 1 thereof,'in which like parts are designated by the same reference sign, the managers stations are shown and which are respectively designated A and A B de notes. a single stenographers statlon. practice, of course, aglarger number of steno'g raphers 'stations would always be provided.

but oneis suflicient to illustrate all the prin-' ciples of the inventions Wlth the above sta- 'tions it is desirable to establish communication from "either of the managers! stations to stenographer station B, or from station B to either Inanagers station select vel or from eithermanagers station to the ot er-manatical with those of the above mentioned pat.

gers station. For these purposes each m anagers station has two keys or j acks or suita le circuit controlling means and each stenographers station has an appropriate switching device. The actual telephonic instruments of the stations may be of any desired character. For example they may be idencut. 10 denotes the transmitter and 11, the receiver at the stenographers station. 12 is the usual switch hook and 13 is a call bell. 14 is the transmitter at the managers station A and 15 and .16 are a pair of telephone receivers, of which. 15 is of V the ordinary character while 16 is a very sensitive instru ment and may be termed a loud ear piece.

talking.

i The keys or acks at m anagers station A are denominated 19 and 20 and each is as sociated with corresponding drop signals 2]. and 22. Managers'station A has corre sponding keys 19 and 20 and drop signals 21 and 22 talking batteries respectively (l6110113l113t6d 23 and 23 and signal batteries respectively denominated 24 and 24 There are also switches 25 and 25 at the respective managers stations for throwing the ordinary receiver or loud ear piece into the talking circuit.

I will now describe the various conditions and operations which take place and the electrical circuits which are completed in the normal operation of the apparatus' The diagram of circuit shows the apparatus in its normal or assive condition when no one is will suppose the mana er at sta- .tionA"wishes to dictate a lettert'o t e stenog- 'rapher at station B. Under these circum-' stances the key qr jack 20 is operated so as to separate the blades 29 and- 32 thereof. This breaks the connection of these blades with the inside blades 30 and 31 but causes new contacts to be established between the blades 26 and 27, 28 and 29 and 33 and 34. This, first causes a current to flow to stenographers station B so as to ring the call bell therei at and notify the stenographer that a'connection is desired.

The circuit is as follows: from battery 23, wire M, wire M transmit ter 14, wire M blade 34, blade 33, wire '1", wire L s'tenographers signal bell 13, plate 36, wire 1 wire 1 wire M back to battery 23 This circuit therefore rings the'stenographers bell and notifies her that a connec- The managers stations have.

-A need not therefore be descri )ed.

tion is desired. The managers by revious agreement have certain individua predetermined signals; for example managers station A may signal with a single ring, while station A may signal with tworings. Ac cording to the signal received the stenographer at station B moves the switch lever 37 either to the left or to the right so as to complete the selected circuit at-the points 38 or 39. In the present case she will move the lever 38 into engagement with contact 38 at the same time taking her receiver off the hook and a talking circuit will thereupon be completed from manager A to station B as follows: from battery 23 through wire M, wire M managers transmitter 14, wire M connection M blade 34, blade33, wire 1", wire 1 stenographers receiver 11, hook 12, wire M switch 37, contact 38, wire M, blade 29, blade 28,. wire M back to battery 23.

This talking circuit includes only the managers "transmitter and the stenographers receiver. A separate talking circuit is formed from the stenographer to the manager as nection 12?, blade 27, blade 26, wire n wire a",

stenographers transmitter 10, switch hook 12, wire m switch 37, contact 38, wire m", blade 29, blade 28, wire-m", back to battery 23. This completes the stenographers talking circuit to the managers station. Separate talking circuits are therefore established in both directions which are the requirements of this class of apparatus. I will now assume that stenographer B desires to call up manager A She takes the receiver off the hook and removes switch 37 to the left. This closes the signaling circuit through the man-. agers drop 22 as follows: from the battery 24, wire 1, connection 0, blade 30, blade 29, wire m switch 37, ,Wire m switch hook 12 (which was raised to complete this circuit) 'receiver 11, Wire 1 wire 1, blade'31, blade a 32, wire 0 drop signal 22 wire 0 wires 1 and 1 back to battery 24. The signal 22 therefore operates and notifies the manager A to make the connection at his key 20.

The above completes all of the circuit or traiiic conditions which can occur between the managers station A and stenographers station B. The circuits and the procedure are cxactly the same in connection with managers station A and stenographers station E exce t that the switch 37 1s manipulated to the rig lt instead of to the left. lhese circuits in. connection with mana ers station I will now assume that the manager at station A desires to call up and talk to the manager at and 46 and establishes new connection be.

tween blades 40 41, 42 and 43 and 47 and 48. A signaling circuit to the managers station A is completed as follows: from battery 24,

wire 1) connection 2 2 blade 42, blade 43,

wire p blade 43 blade 44 drop signal21 wire p blade 46 blade 45 connection f, wire 1), back to the battery 24. The operation of signal 21 notifies managerA ofthe desired connection and he responds byop crating his key or jack 19 This completes the talking circuit between the two managers as follows: from battery 23 of mana gers station A wire q, wire Q2, transmitter 14 wire (1 connection q, blade 48 blade 47 wire g blade 47, blade 48, wire a, receiver 15, (or 16) wire m wire p blade 42, blade 43, line wire, 1?, blade 43 blade 42 Wire (1 back to the battery 23*. This constitutes the talking circuit from station A to station A The talking circuit from station A to manager -A is as follows: from battery 23 wire g, wire 9 receiver 15 (or 16 Wire 1', wire 1"? blade 41 blade 40 line wire 1' blade 40, blade 41, wire m transmitter 14, wire m connection 10 blade 42, blade 43, line. wire pfl blade 43 blade 42 wire q7, back to battery23 The talking circuits between two managers stations are thereby completed in both directions over separate line circuits as is required. It will be observed that each of these talking circuits -includes onlya single battery namely battery 23 ofstationA The battery 23 of station'A does not take part in any of the talkingcircuits between these two stations but is wholly 'excludedtherefrom under all circumstances' ,w

The operation of the signaling circuits from station A to station A are exactly like those from station A and A and need not be.

gers stations. The-difference in the wiringof the two stations consists essentially in the fact-that wh'ille battery 23 has connections g and g with the wire g and the blade 42 respectively at station A these connections I are omitted in station A}. 'In this way, the battery 23f of sation A is not in circuit when these two managers" stations are connected together, because of the omission of the bat tery connections at the key 19 through which key the connection is necessarily (made between thesestations. This is the construction by which the important fact previously mentioned is secured, namely, that only one battery is used in any talking circuit estab lished either between two managers stations, or between a managers station'and a stenographers station.

In case there are three managers stations their respective connections and wiring must be made so as to secure the same effects as have been described in connection with the two stations A and A 7 i In Fig. 2 I have illustrated diagrammatically the nature of the wiring when there are three managers stations. It is evident that where there are three managers stations each will have to have two keys to selectively call eltherof the other two. the three stations, then each will have keys a I) a b (L 6 The line Wires from key a; station X may run for example to key I)" of station Z as shown. The wires from key I of station X .n1a v run-to key A of station Y. The wires from key 12 of station Y may run to key, a, of station Z. This arrangement will enable any'station to get in connection with any other station of the set. Nowby having certain of the keys wired according to the plan of managers station A as above described, and having the other keys wired according to the plan of managers station'A (above described) it will be possible to get, all the effects of the circuit arrangements of Fig. 1 wit the threestations. For example,

if keys a 1) station X are each wired according to diagram A and keys a and b of station Z are each wired according to diagram A .(Fig. 1) and keys 0, and b are respectively wired with A wire and A wiring, then every possible connection between any two managers stations will have one style of wiring at one end and the other style at the other end, which is all that is required ,to secure the effects already'described in connection with Fig. 1. It is merely necessary to start with the wiring at any station in any way desired and then proceed from that station as a starting point and adapt the wiring of the others to it. In this way the character 'of the wiring at every key at every station is determined. 1' i In Fig. 3 is given a diagram having four managers stations and illustrating the char- -acter of the wiring of the keys of each. The figures 1' and 2 within the circles denote whether A wiring or A Wiring the corresponding keys.

What I claim, is 1 I 1. In a telephone system or apparatus, a plurality of managers stations each having a talking battery, a steno raphers station, means for establishing ta king circuits between said stenographers station and any managers station including the battery 'at suchmanagers station, and means. for cs- If X, Y and Z are,

is used for tablishing a talking circuit between two managers stations, said circuit including the battery at one such station only.

2. In a telephone system or apparatus, a plurality of managers stations each having a battery, a stenographers station, means for establishing a pair of separate talking circuits between said stenographers station and any'd'esired managers station, said circuits including the battery at such managers station, and means for establishing a pair of separate talking circuits between any two managers stations, said circuits including the battery at one managers station only.

3. In a telephone system or apparatus, two managers stations each having its own battery, the circuit connections of one managers station being different from those of the other, and circuits for putting said managers stations into telephonic communication, said circuits including the battery at one manastenogr-aphers station and any manager s station, said circuits including the battery at said from the battery at such station, and talking circuits completed by said keys between the managers stations, whereby the battery at only one managers station is included in any such talking circuit. y 5. In a telephone system or apparatus, a plurality of managersstations interconnected by separate circuits, a talking battery at each managers station, only one terminal of said circuits having any connection with said batteries, and means for establishing telephonic communication over said circuits, whereby said telephonic communication circuits include only the battery at one gers station in every case.

In witness whereof I subscribe. my sig nature, in the presence of two witnesses.

, JOHN l/V. KELLY, JR. Witnesses:

WALno W. CHAPIN, JAMES DAN'roNio.

1n ana- 

